I know the title is very common but I will make the story different from the usual ones! so, please read!^^

Jaejoong was an angel from Heaven but, when he was in Heaven, he made a really big fuss, so God sent him to earth and took away his 'halo' from his head. To come back to Heaven, God has assigned him to a kind of mission to make a certain girl's life that was really miserable to a really wonderful life. and that certain girl is Tiffany (Hwang Miyoung)

So with no more choices, he had to make Tiffany's life wonderful.
But, while he was sharing the good and the bad times together with Tiffany, he fell in love with her until...

Kim Jaejoong

Jaejoong is the fallen angel, sometimes he can be a really childish guy but sometimes, he can be a serious guy
but the most is childish, like 75% of his personality is childish and the 25% is serious
a playboy but really understand woman

Tiffany (Hwang Miyoung)

a pretty strange girl, that's why her life is miserable
but she learnt to change a little by a little from Jaejoong
her first love had humiliated her really bad when she confessed to him so she had a little trauma about confessing love to boys but she learnt to trust Siwon, the one that have been taking care of her since her last family member, her sister, died. and Siwon is the only one guy that she trust.
But she didn't realise until one day she knew Siwon has been..

she doesn't realise her singing skills until Jaejoong discover it and made her the number one singer in Korea